Modularize the libdimension codebase.

1 files changed, 47 insertions, 0 deletions

diff --git a/libdimension/model/cameras/perspective.c b/libdimension/model/cameras/perspective.c
new file mode 100644
index 0000000..6f1a9fc
--- /dev/null
+++ b/libdimension/model/cameras/perspective.c
@@ -0,0 +1,47 @@
+/*************************************************************************
+ * Copyright (C) 2010-2014 Tavian Barnes <tavianator@tavianator.com>     *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library is distributed in the hope that it will be      *
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty   *
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+/**
+ * @file
+ * Perspective cameras.
+ */
+
+#include "dimension/model.h"
+#include <stdlib.h>
+
+/// Perspective camera ray callback.
+static dmnsn_ray
+dmnsn_perspective_camera_ray_fn(const dmnsn_camera *camera, double x, double y)
+{
+  dmnsn_ray l = dmnsn_new_ray(
+    dmnsn_zero,
+    dmnsn_new_vector(x - 0.5, y - 0.5, 1.0)
+  );
+  return l;
+}
+
+// Create a new perspective camera.
+dmnsn_camera *
+dmnsn_new_perspective_camera(dmnsn_pool *pool)
+{
+  dmnsn_camera *camera = dmnsn_new_camera(pool);
+  camera->ray_fn = dmnsn_perspective_camera_ray_fn;
+  return camera;
+}